Conductors of the ITER magnets

Development of multifilamentary niobium–titanium and niobium–tin strands for the International Thermonuclear Experimental Reactor project

“…From critical current characteristics the n-values larger than 30 at 5 T have derived for the NbTi strands. In order to gain reliable electromagnetic behavior for different superconducting coils during ITER operation, an expected temperature margin DT = (T cs À T op ) has been proposed [8], where T cs is the current sharing temperature and T op the operating temperature. Recently, much attention has been therefore paid to the temperature dependence of critical currents for superconducting strands of ITER.…”

Review of Nb3Sn conductors for ITER

“…New specifications (as of January 2006) for the ITER strands are reported in Table 3, compared to the old ones [9,10]. Also, the cable void fraction was slightly reduced (from 34% to 33%) providing a better support of the strands in a tighter cable.…”

DC and transient current distribution analysis from self-field measurements on ITER PFIS conductor

“…A number of studies are presently being performed to investigate the behaviour of "cable-in-conduit conductors" (CICC) superconducting cables under conditions of practical interest for the ITER magnets [1,2]; in particular, the current distribution (CD) amongst the conductor's strands is an important issue as it may compared [6,7]. Both models are based on magnetostatic equations; the first one takes into account the internal 3D structure of the cable.…”